/* geoStrat — methodology page ---------------------------------------------- */
:root {
  --bg: #f6f7f9; --surface: #ffffff; --surface-2: #f1f3f6; --border: #e3e6eb;
  --text: #16191f; --muted: #5f6b7d; --primary: #1B4FA0; --primary-soft: #E6EDF8;
  --accent: #ff5605; --ok: #12805c; --warn: #b54708; --danger: #d92d20;
  --c1: #1B4FA0; --c2: #00a3cc; --c3: #ff5605; --c4: #7a5af8; --c5: #12805c; --c6: #d92d20;
  --grid: #e3e6eb; --ink-soft: #98a2b3;
  --radius: 14px; --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216; --surface: #171b21; --surface-2: #1f242c; --border: #2b313b;
    --text: #e8ebf0; --muted: #9aa4b2; --primary: #7FA6F5; --primary-soft: #1c2640;
    --accent: #ff8a4c; --ok: #3ccb8f; --warn: #f5a524; --danger: #ff6b5f;
    --c1: #7FA6F5; --c2: #38c6e8; --c3: #ff8a4c; --c4: #a48bff; --c5: #3ccb8f; --c6: #ff6b5f;
    --grid: #2b313b; --ink-soft: #5f6b7d;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1216; --surface: #171b21; --surface-2: #1f242c; --border: #2b313b;
  --text: #e8ebf0; --muted: #9aa4b2; --primary: #7FA6F5; --primary-soft: #1c2640;
  --accent: #ff8a4c; --ok: #3ccb8f; --warn: #f5a524; --danger: #ff6b5f;
  --c1: #7FA6F5; --c2: #38c6e8; --c3: #ff8a4c; --c4: #a48bff; --c5: #3ccb8f; --c6: #ff6b5f;
  --grid: #2b313b; --ink-soft: #5f6b7d;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.65 var(--font); color: var(--text); background: var(--bg);
       -webkit-font-smoothing: antialiased; }
a { color: var(--primary); }
b, strong { font-weight: 600; }
code { font: 13.5px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface-2);
       padding: 1px 5px; border-radius: 5px; }

.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between;
       gap: 12px; padding: 12px 20px; background: color-mix(in srgb, var(--bg) 88%, transparent);
       backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 8px; font-size: 18px; text-decoration: none; color: var(--text); }
.brand b { font-weight: 700; }
.brand-mark { width: 22px; height: 22px; border-radius: 6px;
  background: conic-gradient(from 200deg, #1B4FA0, #00b5e2, #ff5605, #ed1b2e, #1B4FA0); }
.top nav { display: flex; gap: 6px; align-items: center; }
.pill { display: inline-flex; align-items: center; height: 32px; padding: 0 12px; border-radius: 999px;
        border: 1px solid var(--border); background: var(--surface); color: var(--text); text-decoration: none;
        font-size: 14px; cursor: pointer; }
.pill:hover { background: var(--surface-2); }

.layout { max-width: 1160px; margin: 0 auto; padding: 0 20px; display: grid;
          grid-template-columns: 220px minmax(0, 1fr); gap: 48px; }
.toc { position: sticky; top: 72px; align-self: start; padding: 32px 0; font-size: 14px; }
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: s; }
.toc li { counter-increment: s; }
.toc a { display: block; padding: 5px 10px; border-radius: 8px; color: var(--muted); text-decoration: none; }
.toc a::before { content: counter(s) ". "; color: var(--ink-soft); }
.toc a:hover, .toc a.on { color: var(--text); background: var(--surface-2); }

main { padding: 32px 0 96px; min-width: 0; }
.hero { position: relative; padding: 40px 0 12px; }
.hero::before { content: ""; position: absolute; inset: -40px -40px auto auto; width: 420px; height: 320px; z-index: -1;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--c1) 22%, transparent), transparent 70%),
              radial-gradient(closest-side at 70% 60%, color-mix(in srgb, var(--c3) 20%, transparent), transparent 70%);
  filter: blur(10px); }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--c3); }
.hero h1 { font-family: var(--display); font-weight: 600; font-size: clamp(36px, 6vw, 60px); line-height: 1.03;
           letter-spacing: -.025em; margin: 10px 0 18px; max-width: 800px; }
.hero h1 em { font-style: italic; color: var(--primary); }
.hero p.lead { font-size: 19.5px; color: var(--muted); max-width: 700px; margin: 0; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 28px 0 8px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat .n { font-family: var(--display); font-size: 32px; font-weight: 600; letter-spacing: -.02em; line-height: 1.1; }
.stat .l { color: var(--muted); font-size: 13.5px; line-height: 1.35; }

section { padding-top: 56px; scroll-margin-top: 64px; }
h2 { font-family: var(--display); font-weight: 600; font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -.015em;
     margin: 0 0 14px; line-height: 1.15; display: flex; align-items: baseline; gap: 14px; }
h2 .k { font-size: .95em; color: transparent; -webkit-text-stroke: 1.2px var(--primary); font-weight: 700;
        min-width: 1.4em; }
.pull { font-family: var(--display); font-size: 22px; line-height: 1.35; font-style: italic; color: var(--text);
        border-left: 3px solid var(--c3); padding: 4px 0 4px 18px; margin: 20px 0; max-width: 700px; }
h3 { font-size: 18.5px; margin: 26px 0 8px; }
p { margin: 0 0 14px; max-width: 760px; }
ul.tight { margin: 0 0 14px; padding-left: 20px; max-width: 760px; }
ul.tight li { margin: 3px 0; }

figure { margin: 18px 0 22px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
         padding: 18px; }
figure svg { display: block; width: 100%; height: auto; }
figcaption { color: var(--muted); font-size: 14px; margin-top: 10px; line-height: 1.45; }
svg text { font-family: var(--font); fill: var(--text); }
svg .muted { fill: var(--muted); }
svg .small { font-size: 11px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; margin: 14px 0 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.card h4 { margin: 0 0 4px; font-size: 15.5px; }
.card p { margin: 0; font-size: 14.5px; color: var(--muted); }
.tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 999px;
       background: var(--primary-soft); color: var(--primary); margin-bottom: 6px; }

.tbl { overflow-x: auto; margin: 14px 0 20px; border: 1px solid var(--border); border-radius: var(--radius);
       background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td { text-align: left; padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; background: var(--surface-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.win { color: var(--ok); font-weight: 600; }
.lose { color: var(--danger); }

.note { border-left: 3px solid var(--primary); background: var(--primary-soft); padding: 12px 16px;
        border-radius: 0 10px 10px 0; margin: 16px 0; max-width: 760px; }
.note.warn { border-color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, var(--surface)); }
.formula { font: 15px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface);
           border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; margin: 12px 0 16px;
           overflow-x: auto; white-space: nowrap; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); margin-top: 48px; padding-top: 18px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding: 0 16px; }
  .toc { display: none; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .top { padding: 10px 16px; }
  figure { padding: 12px; }
}
@media (max-width: 480px) {
  body { font-size: 15.5px; }
  .top nav .pill.hide-s { display: none; }
}

/* pedagogical blocks */
.lex { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px; margin: 10px 0 8px; }
.lexcard { display: grid; grid-template-columns: 72px 1fr; gap: 14px; align-items: start; background: var(--surface);
           border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.lexcard svg { width: 72px; height: auto; }
.lexcard h4 { margin: 0 0 4px; font-size: 16px; }
.lexcard p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.5; }
.lexcard p b { color: var(--text); }
.example { background: var(--surface); border: 2px solid var(--c3); border-radius: 16px; padding: 18px 20px; margin: 10px 0 18px; }
.example h3 { margin: 4px 0 12px; font-family: var(--display); font-size: 21px; }
.ex-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 14px; }
.ex-grid .big { font-family: var(--display); font-size: 34px; font-weight: 600; line-height: 1; }
.ex-grid .muted { font-size: 14px; }
.bars { display: grid; gap: 6px; }
.bar { display: grid; grid-template-columns: 44px 1fr 48px; align-items: center; gap: 10px; font-size: 14px; }
.bar i { display: block; height: 14px; border-radius: 4px; }
.bar b { text-align: right; font-variant-numeric: tabular-nums; }
@media (max-width: 600px) { .ex-grid { grid-template-columns: 1fr; } .ex-grid .big { font-size: 28px; } }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 600px) { .cards.two { grid-template-columns: 1fr; } }
@media (max-width: 700px) {
  figure { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  figure > svg { min-width: 620px; }
  figure::after { content: "↔ glisser pour voir tout le schéma"; display: block; font-size: 12px; color: var(--muted); margin-top: 6px; }
  .formula { white-space: normal; font-size: 14px; }
}